# Honeywell Home THR842DEU DT2R Wireless Thermostat

The Honeywell Home THR842DEU DT2R is a wireless room thermostat with an LCD display, push-button controls and a timed ECO setting. Its stated self-learning TPI control and 5°C to 35°C set-point range make it relevant for buyers seeking straightforward heating or cooling control, but confirm compatibility with the existing system before choosing it.

- [Original product page](https://bargainpostbox.co.uk/product/honeywell-home-thr842deu-dt2r-wireless-thermostat)
- [View offer](https://bargainpostbox.co.uk/visit/honeywell-home-thr842deu-dt2r-wireless-thermostat)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: Honeywell Home
- Model: THR842DEU
- Category: Tools & Garden > Electrical & Plumbing
- Price: 80.00 GBP
- Previous price: 134.90 GBP
- Discount: 41%
- Price checked: 2026-11-12T15:10:57.984Z
- Rating: 4.1 / 5
- Reviews: 102

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Timed ECO setting lets the user choose a lower set point for 1 to 24 hours in one-hour increments.
- The listing describes two-way wireless communication and a signal-strength test.
- Manufacturer feature details state that batteries are included and the front cover unclips for battery changes.

## Pros

- Timed ECO control offers a defined lower-temperature period without requiring a fixed daily schedule.
- Wireless operation and stated wall mounting may suit installations where a wired room control is not wanted.
- The large display and simple interface are presented as easy to read and operate.

## Specifications

### Identity
- Brand: Honeywell Home
- Model: THR842DEU
### Display
- Screen size: 9 Centimetres
- Screen technology listed: LCD
### Connectivity and controls
- Wireless connection listed: Wireless
- Control methods listed: Touch
### Power and battery
- Power configuration: Battery Powered
### Dimensions and installation
- Mounting types listed: Wall Mount
- Dimensions listed: 2.9D x 9W x 9.2H centimetres
### Temperature control
- Set-point range: 5°C to 35°C
- Special feature: Intelligent Self-Learning \(TPI\) and ECO Mode

## Before you buy

- The title identifies a THR842DEU DT2R, while A+ content repeatedly describes DT3 features and compatibility. The listing also describes controls as both push-button and touch, calls the screen LCD in one field but LED-based elsewhere, and gives a battery-powered configuration alongside 230 Volts. Verify the exact model, control interface, display, power arrangement and compatibility with your heating or cooling system before buying. The 9-centimetre screen size is listed without clarifying what dimension it measures.

## In the box

- 1 piece (Included): The listed package contents are given in German as one piece, without identifying any separate accessories.

## A good fit for

- Buyers seeking a wireless room thermostat with a timed ECO setting and self-learning TPI control.
- Households that prefer local controls and do not need the stated listing features to depend on an app or Wi-Fi.

## Less suited to

- Buyers who need confirmed compatibility with a particular boiler, heat pump or control system without checking the exact model.
- People seeking a clearly specified programmable weekly schedule or smart-device app control. The supplied THR842DEU feature details do not confirm these.

## Customer feedback

There is no supplied written customer-feedback summary, so specific praised features or complaints cannot be attributed to customers. Aggregate ratings lean positive, but a substantial minority fall into the lower star categories. Treat this as a broad satisfaction signal rather than evidence about compatibility, controls or performance for a particular installation.

## Frequently asked questions

### Does the THR842DEU need Wi-Fi?
The supplied THR842DEU feature details describe wireless communication but do not specify Wi-Fi. A+ text says DT3 thermostats need no Wi-Fi, but that is a different model line, so confirm the requirements for the exact unit.
### How does the ECO setting work?
The listing says the ECO button allows a lower set point for a timed period chosen from 1 to 24 hours in one-hour increments.
### Is it compatible with my heating system?
The listing describes heating or cooling control, but its A+ compatibility information relates to the DT3 range rather than consistently to the THR842DEU. Check compatibility for your exact system and thermostat model before purchase.

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## Images

![Honeywell Home THR842DEU DT2R Wireless Thermostat — 1](https://bargainpostbox.co.uk/i/4RvG5nVStsSxJ3BOYtIBO37wabhaGvz80m27by5WFUAtWfgHlm8OAPb2kAS1N8O4OIG47-xRJ25E5qWoZplZDykR3sw1qlo0BP1-p-6yxLcFlrN9FDD7.jpg)

![Honeywell Home THR842DEU DT2R Wireless Thermostat — 2](https://bargainpostbox.co.uk/i/lgHncElfeSiG4W47NHisnKzGfQo3hZPmYUM6rNixBMDzVi8Gcpk4nR_AG8sZvBfB5sYTnKpcisGzhzeVC09DzmGM-HhOcWzM6CwkcCRvCSkbA7H1zg2X.jpg)

![Honeywell Home THR842DEU DT2R Wireless Thermostat — 3](https://bargainpostbox.co.uk/i/Q1ddX2bXqmftKOopcNtfUWuYCEw9dMmVs2Nv6bS9sAi0bTzKVOClnUWqeAjyDaLDeL_HH94VgLrQdxtbGZqlPa7F8yg3-mdHqbKUyqoDQklGnS9_ew2V.jpg)

![Honeywell Home THR842DEU DT2R Wireless Thermostat — 4](https://bargainpostbox.co.uk/i/l_uzdU-niaqNy4-I7bUCkrw36pyv9n7nqfEmC0ksmpcFde3rkueMR4auhS_rnrPrhPBGFpciX6HoZ-jg4lj15fE6x4J9Nv6gg9BWZIEW7qZH6S6DNQ1b.jpg)

![Honeywell Home THR842DEU DT2R Wireless Thermostat — 5](https://bargainpostbox.co.uk/i/FLgFCK2SXTzedgUQaTAy0d9txNYzSbOBu0p157H2S1dC0eMWQGUiE30wgYX6E8vRxlbP8s8Q1nykpEoX23he1YoL9GopJU77bcX2WBbIvw.jpg)